TRENDnet TI-PG541i - System Information; Modbus

© Copyright 2019 TRENDnet. All Rights Reserved.
TRENDnet User’s Guide
Industrial Managed Switch Series
70
Modbus
MODBUS TCP supports different types of data format for reading. The primary four types
of them are:
Data Access Type
Function
Code
Function Name
Note
Bit access
Physical Discrete
Inputs
2
Read Discrete
Inputs
Not support
now
Internal Bits or
Physical
Coils
1
Read Coils
Not support
now
Word
access
(16-bit
access)
Physical Input
Registers
4
Read Input
Registers
Physical Output
Registers
3
Read Holding
Registers
Not support
now
MODBUS Data Map and Information Interpretation of IE Switches
MODBUS base address of switches is 1001(decimal) for Function Code 4.
Address
Offset
Data
Type
Interpretation
Description
System Information
0x0000
1 word
HEX
Vendor ID = 0x0b04
0x0001
16 words
ASCII
Vendor Name = “ABCDEFG Corp.”
Word 0 Hi byte = ‘A’
Word 0 Lo byte = ‘B’
Word 1 Hi byte = ‘C’
Word 1 Lo byte = ‘D’
Word 2 Hi byte = ‘E’
Word 2 Lo byte = ‘F’
Word 3 Hi byte = ‘G’
Word 3 Lo byte = ‘ ’
Word 4 Hi byte = ‘C’
Word 4 Lo byte = ‘o’
Word 5 Hi byte = ‘r’
Word 5 Lo byte = ‘p’
Word 6 Hi byte = ‘.’
Word 6 Lo byte = ‘\0’
0x0020
16 words
ASCII
Product Name = “SWITCH”
Word 0 Hi byte = ‘S’
Word 0 Lo byte = ‘W’
Word 1 Hi byte = ‘I’
Word 1 Lo byte = ‘T’
Word 2 Hi byte = ‘C’
Word 2 Lo byte = ‘H’
0x0040
7 words
Product Serial Number
Ex: Serial No=A000000000001
0x0050
12 words
ASCII
Firmware Version=” 8648-999-
1.1.0.S0”
Word 0 Hi byte = ‘8’
Word 0 Lo byte = ‘6’
Word 1 Hi byte = ‘4’
Word 1 Lo byte = ‘8’
Word 2 Hi byte = ‘-’
Word 2 Lo byte = ‘9’
Word 3 Hi byte = ‘9’
Word 3 Lo byte = ‘9’